<blockquote>Automatically replace the copy I'm reading with the update, simultaneously removing my ability to ever get back to the version I was reading?</block

<blockquote>Automatically replace the copy I'm reading with the update, simultaneously removing my ability to ever get back to the version I was reading?</blockquote> This is an asinine example. Why would the author do this except to correct typos or update the kind of information you want updated? Who are these nefarious authors trying to destroy your reading experience? They don't exist, and this kind of lazy thinking is why it took until very recently for browsers to even have the possibility of auto-update without polling (hello 1970).